Plate Tectonics Question Preview (ID: 35996)


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Which cannot form as the result of oceanic-oceanic convergence?
a) rift zones
b) trenches
c) subduction zones
d) island arc complexes

When do shield volcanoes form?
a) when layer upon layer of lava accumulates during nonexplosive eruptions
b) when layers of hardened frothy mixtures of gas and magma formed by explosive eruptions alternative with layers of oozing lava
c) when eruptions eject small pieces of magma into the air and the pieces fall to the ground and collect around a vent
d) when thick lava hardens around a central vent

What is the approximate percentage of Earth's surface that is covered by continents?
a) 10 percent
b) 30 percent
c) 50 percent
d) 70 percent

Why would a thickness of continental crust displace less mantle than the same thickness of oceanic crust?
a) continental crust is more dense
b) continental crust is less dense
c) continental crust is mainly basalt
d) continental crust is closer to the mantle

At which type of plate boundary do the highest mountains form?
a) convergent; continental-continental
b) convergent; continental-oceanic
c) divergent; oceanic-oceanic
d) divergent; oceanic-continental

Organize the terms mantle, continental crust, and oceanic crust in order of increasing density
a) mantle, oceanic crust, continental crust
b) oceanic crust, mantle, continental crust
c) continental crust, oceanic crust, mantle
d) oceanic crust, continental crust, mantle

During oceanic-oceanic convergence, where do island arc volcanoes form?
a) on the plate that is subducted
b) on the plate that is not subducted
c) do not form on either plate
d) form on both plates

Which is not associated with orogeny at convergent boundaries?
a) island arcs
b) highly folded and faulted ranges
c) ocean ridges
d) deformed sedimentary rocks

Which causes difference in elevation on Earth?
a) density and thickness of the crust
b) vertical dikes and pillow basalts
c) seamounts and hotspots
d) uplifted and faulted mountains

Who were the first people to propose the idea that Earth's landmasses at one time were all connected?
a) explorers
b) mathematicians
c) scientists
d) mapmakers

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